Titanium valve check...

[Jeremy1374]

Originally Posted by SSDiv6

Great question!
300 and 400 series Stainless steel has a vast difference in the percentage of Chromium. 300 series also has Nickel, and Molybdenum while the 400 series does not. Therefore, they have different weight densities. In addition, how do they account for weight variations for hollow stem valves based on the length of the valve?

316 stainless has moly not 304

[rod butcher]

They also checked Joe Santangelo during tear down for titanium valves doing the mass volume test and weighing valves.

[Bill Ringer]

Originally Posted by charlie westcott

Fyi to anyone that thinks they can get away with Ti valves, they figured out how to check for that now. Very simple test. Measure the displacement of the valve, figure the mass based on steel, wham bam.
I am glad that they came up with this method. Pretty basic. One NHRA guy told me that the only way to check was to put it on a valve grinder and see what kind of sparks it throws.
That might upset a racer.
Its too bad they dont have time or maybe the manpower to do more teardowns. Its what always made Indy relevant in my mind.
I only know 2 cars they checked, which were the hemis, that believe it or not had steel valves.
If we can run those engines as high as we do with steel, anyone that thinks they need Ti might want to research cam suppliers, I know a guy..
thanks
cw

There are devices that can conclusively ID the material without removing the head, just remove the valve spring. With the spring off one can check the stem with an XRF metal analyzer. These are accurate and as small as a few pounds. The cost can be an issue as ones just for this type of test would be around $15K new, less for refurbished plus, they can be rented. If there are other components such as chassis parts that need the material verified it's possible the cost could be justified. I've used these, they're super easy to use and accurate.
This article has all the basic info on this technology - https://blog.metalvp.com/articles/ha...-honest-review

[Frank Castros]

Originally Posted by Bill Ringer

There are devices that can conclusively ID the material without removing the head, just remove the valve spring. With the spring off one can check the stem with an XRF metal analyzer. These are accurate and as small as a few pounds. The cost can be an issue as ones just for this type of test would be around $15K new, less for refurbished plus, they can be rented. If there are other components such as chassis parts that need the material verified it's possible the cost could be justified. I've used these, they're super easy to use and accurate.
This article has all the basic info on this technology - https://blog.metalvp.com/articles/ha...-honest-review

Bill Ringer needs to get back to the track with his High Country 'Cuda.

[jimi vignogna]

I was at the tear down on Saturday morning to speak with Travis and he was weighing Chucks valves , It was nice to see nhra actually checking stuff , I wish they had more man power to do tear down like it used to be.